Virtus contains three stories, one of medium length and two shorter ones:

"Yushin~virtus(Virtus~Manliness)"

In ancient Rome, a trainee gladiator, Gaius, is raped by a champion gladiator, Crescens, and vows revenge for his humiliation. It is a story of the love, the hatred, and the destinies of these two enslaved gladiators.

"Setsugen-Byobyo(The vast snow field)"

During the Russo-Japanese War, a white-bearded lieutenant general and the leader of the mounted bandits make love to one another: a short, benign piece about a big, old bear and his boy.

"Darenimo-Ienai(I can't tell it to anybody)"

A hunky college student falls in love with his new father-in-law, but his new dad is a bisexual, and starts to train his new son as his personal bottom, addressing him using a feminization of his name!

(Source: MU)